12695689 has 4 divisors (see below), whose sum is σ = 12732624. Its totient is φ = 12658756.

The previous prime is 12695681. The next prime is 12695693. The reversal of 12695689 is 98659621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98659621 = 751 ⋅131371.

It is a cyclic number.

It is not a de Polignac number, because 12695689 - 2³ = 12695681 is a prime.

It is a super-2 number, since 2×12695689² = 322361038369442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12695681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17947 + ... + 18640.

It is an arithmetic number, because the mean of its divisors is an integer number (3183156).

Almost surely, 2^12695689 is an apocalyptic number.

It is an amenable number.

12695689 is a deficient number, since it is larger than the sum of its proper divisors (36935).

12695689 is an equidigital number, since it uses as much as digits as its factorization.

12695689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36934.

The product of its digits is 233280, while the sum is 46.

The square root of 12695689 is about 3563.1010370182. The cubic root of 12695689 is about 233.2842533959.

The spelling of 12695689 in words is "twelve million, six hundred ninety-five thousand, six hundred eighty-nine".